SYSTEM GROUNDING CAUTION
SYSTEM GROUNDING
· SPD must be installed on solidly grounded power systems.
· Verify that the service entrance e quipment is bonded to ground in
accordance with all applicable codes.
· Verify that the neutral terminals are grounde d to system ground in
accordance with all applicable codes.
Failure to follow these instructions can result in equipment
damage.
An equipment ground conductor must be used on all elec trical circuits
connected to the SPD. For the best performance, use a single-point
ground system where the service entrance grounding e lectrode system
is connected to and bonded to all other available electrodes, building
steel, metal water pipes, driven rods, etc. (for reference, see IEEE STD
142-1991). The ground impedance measurement of the electrical system
should be as low as possible, and in compliance with all ap plicable
codes, for electronics and computer systems.
When metallic raceway is used as an additional grounding con ductor,
an insulated grounding conductor should be run inside the raceway and
sized in accordance with all applicable codes.
WARNING
INADEQUATE RACEWAY ELECTRICAL CONTINUITY
· Ground impedance must be as low as possib le and in compliance with
all applicable codes for electronic and compu ter systems.
· Install an insulated grounding conductor inside a m etallic raceway when
the raceway is used as an additional grounding conductor. Size the
conductor in accordance with all applicable code s.
· Maintain adequate electrical continui ty at all raceway connections.
· Do not use isolating bushings to interrupt a metallic raceway run.
· Do not use a separate isolated ground for the SPD.
· Verify proper equipment connec tions to the grounding system.
· Verify ground grid continuity by inspe ctions and testing as part of a
comprehensive electrical maintenance progra m.
Failure to follow these inst ructions can result in d eath or
serious injury.
ELECTRICAL
APC MODULAR PANEL PRODUCTS Surge Protective Device (SPD)
10